Diverging jet cutting tip for cutting torches



Jan. 5, 1932.

C. J. COBERLY DIVERGING JET CUTTING TIP FOR CUTTING TORfiHES Original Filed Sept. 29, 1923 WWW W 0B! 605 58L y,

Patented Jan. 5, 1932 UNITED STATES PATENT OFFICE CLARENCE J. .COBERLY, LOS ANGELES, CALIFORNIA, ASSIGNOB TO KOBE, INC 01' HUNTINGTON PARK, CALIFORNIA,

A CORPORATION OF OALIEORNIA DIVERGING J ET CUTTING TIP FOB CUTTING TOR-GEES Original application filed September 29, 1923, Serial No. 665,047. Divided and this application filed February 19, 1930 This application is a division of my application entitled Diverging jet cutting tip for cutting torches and method of using same, Serial N 0. 665,647, filed September 29, 1923, said a plication having resulted in Patent No. 1, 91,159, issued February 3, 1931.

My invention relates to the art of cutting slots in metal plates and is particularly apthe drawings, a ti plicable to cutting slots in oil well casing. It is generally necessary in the production of oil to provide a steel casing or pipe which extends from the surface of the earth down into the oil sands, and which is perforated where it extends into the oil sands to allow the oil to pass therethrough, the perforations being sufficiently small to exclude the coarse sand and gravel surrounding the casing. It has been found that oil well casing can be economically perforated by means of an oxygen cutting torch, before being placed in the well. It has also been found that it is highly desirable that the slots out in the-casing be of a keystone-shaped section, that is to say, that the slots be narrower at the outer surface of the pipe than at the inner.

It is an object of my invention to provide a peculiar form of cutting tip by which keystone-shaped slots can be produced in oil well casing.

Further objects and advantages will be made evident hereinafter.

Referring to the drawings which are for illustrative purposes only,

Fig. 1 is a cross-section of a cutting tip adapted to carry on my invention.

Fig. 2 is a cross-section on a plane represented by the line 2-2 of Fig. 1.

In the form of the invention illustrated in 10 is provided having a frusto-conical hea 11 adapted to be secured in the vcutting torch in the usual manner. Mixed gas passages 12 are provided, these passages being supplied with a mixture of oxygen and some combustible gas. A central oxygen opening 13 is provided, this opening consisting of a counterbored portion A, into which two divergent orifices 14 and 15 are drilled. The dimensions of the various parts are somewhat important and when cutting slots 3/32, of an inch in thickness on the top Serial No. 429,774.

and 9/64 of an inch in thickness on the bottom in 7/ 16 inch material, the dimensions should be as follows: The angle B should preferably be 7 degrees and the orifices 14 and15 should be .028 inch in diameter. An oxygen pressure of 110 pounds per square inch should be used. When a tip of this description is operated on 7/16 inch material, it produces a slot having approximately the dimensions and shape shown 1n Fig. 1.

The action of the tipis as follows: The jets produced by the orifices 14 and 15 being divergent, form a fan-shaped jet having its greatest width along line :vw which extends transversely across the desired slot at right angles thereto. The spreading action of the jet tends to cut away the slot in the form shown in Fig. 1, and if the tip 10 is moved along the material at a substantiall uniform speed, it is possible to cut a slot 0 the form shown in Fig. 1 of substantially uniform cross-section and at a very low cost ofoperation.

The form of slot shown in Fig. 1 is particularly valuable in oil well work, since the walls 20 and 21 are inclined to each other. Any material entering the slot through the outer narrow opening will ass entirely through the slot without stopping and clogging same.

By forming the slots with a jet of definite form, it is possible to form a slot of uniform width and form throughout its length.

I have found that by cutting slots by my improved tip, not only is a very uniform slot produced, but the action of the cuttin jet hardens the surface of the metal an increases its strength.

I claim as my invention:

1. A tip for a cutting torch comprising: a block of material having a plurality of oxygen jet holes formed therein, said holes being so situated that they form diverging ets.

2. A tip. for a cutting torch comprising: a block of material having suitable heating flame holes and a plurality of oxygen jet holes formed therein, said. oxygen jet holes beting so situated that they form diverging e s.

3. A ti for a cutting torch comprising: a block 0 material having a plurality of circularly arranged heating flame holes and a plurality of oxygen jet holes formed therein within the circle of said heating flame holes, said oxygen. jet holes being so situated that they form diverging jets.

4. A tip for a cutting torch comprising: nozzle means for formin a pluralit of oxyen jets in close relations ip to and iverging irom each other. I

5. A .tip for a cutting torch comprising: nozzle means for forming a plurality of oxygen jets in close relationship to and diverging from eachother, said jets lying substantially in the same lane.

6. A torc for cutting keystone-shaped slots in metal, comprising: nozzle means for forming a plurality of oxygen jets in close relationship to and divergin from each other to produce a fan shapeii cutting jet, said torch being adapted to be maintained in such a position relative to the metal as to cut outwardly diverging walls of keystone-shape therein when moved relatively thereto.

7 A torch of the character described, comprising: oxygen supplying orifice means so disposed with respect to the torch as to form a fan shaped cuttin jet, said jet being adapted to be maintaine in such a position while moving relative to the metal as to cut outwardly diverging walls therein defining a keystone slot.

8. A tip for a cutting torch comprising: a block of material having a plurality of oxygen jet holes formed therein, said holes being so situated that they form a fan shaped cuttin flame adapted to form a keystoneshape slot in the metal.

9. A cutting torch of the character described for forming keystone-shaped slots in metal comprising: nozzle means for forming a plurality of oxygen jets in close relationship to and diverging from each other to form a fan shaped cutting blade adapted to be so maintained and moved relative to the metal as to form relatively diverging walls therein defining substantially keystoneshaped slots.

10. A torch for cutting keystone-shaped slots in metallic objects, said device comprising oxygen supply passage means so situated and constructed as to produce a substantially fan-shaped cutting flame adapted to be maintained and moved in such a manner relative to the metal as to cut outwardly diverging walls therein.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 28th day of January, 1930.

Y CLARENCE J. COBERLY. 

